职教组卷基于海量职教高考试题库建立的在线组卷及学习系统
职教组卷
  • 题型:解答题 题类:模拟题 难易度:较易

    已知数列\(\{a_{n}\}\)是递增等比数列,且\(a_{3}=4\),\(a_{2}+a_{4}=10\),\(S_{n}\)为等差数列\(\{b_{n}\}\)的前\(n\)项和,且\(b_{1}=a_{1}\),\(S_{2}=a_{2}+1.\)
    \((1)\)求数列\(\{a_{n}\}\),\(\{b_{n}\}\)的通项公式;
    \((2)\)若\(c_{n}=a_{n}b_{n}\),求数列\(\{c_{n}\}\)的前\(n\)项和\(T_{n}.\)
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